Harry picked up the message in the empty class room while invisible, decoded it and told Flitwick the message. He was already waiting there because Quirrel had anticipated that he would be subjected to a test of this sort. It’s all in the chapter.
It wasn’t til around this post that I realized that Harry’s plan was going to work. I was thinking the situation was something like Harry at 9 PM being Time-Turned from 9 PM +t, so that by the laws of time, no piece of information from him could travel back past 3 PM +t. I think I can see now that that wouldn’t have made sense, but now I’m back to DanArmak’s question.
Harry picked up the message in the empty class room while invisible, decoded it and told Flitwick the message. He was already waiting there because Quirrel had anticipated that he would be subjected to a test of this sort. It’s all in the chapter.
It wasn’t til around this post that I realized that Harry’s plan was going to work. I was thinking the situation was something like Harry at 9 PM being Time-Turned from 9 PM +t, so that by the laws of time, no piece of information from him could travel back past 3 PM +t. I think I can see now that that wouldn’t have made sense, but now I’m back to DanArmak’s question.